The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 11, 1976
Filed:
Nov. 29, 1974
Applicant:
Inventor:
Leo Modest Sprengers, Eindhoven, NL;
Assignee:
U.S. Philips Corporation, New York, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
313181 ; 313227 ;
Abstract
The invention relates to a low-pressure sodium-vapour discharge lamp which contains an excess of sodium. According to the invention the discharge tube contains a capillary connecting duct extending from a pool of liquid sodium. The provision of the capillary connecting duct prevents the power consumption of the lamp from increasing during the life of the lamp.